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Q. Example on Law of Conservation of Mass? A slim strip of iron with a mass of 15.72 g is placed in to a solution containing 21.12 g of copper and copper (II) sulphate begins t
The number of electrons in the valence shell of calcium is: (1) 6 (2) 8 (3) 2 (4)4 Ans: 2
what is metallurgy
Q. How do we measure food texture? Food texture can be evaluated by mechanical test or instrumental methods. This is called as objective evaluation. When we use the human sens
The wave nature of an electron was first given by: (1) De-Broglie (2)Heisenberg (3)Mosley (4)Sommerfield Ans: De-Broglie
The energy required to dislodge electron from excited isolated H-atom, IE 1 = 13.6 eV is: (1) = 13.6eV (2) > 13.6eV (3) 3.4 eV
define packing of atoms...
Water pressure is the same in all directions Punch holes around the base of a tall tin can with a nail. Wrap the holes as above with a strip of tape. Fill the can with water an
Q. What is basic need of SI Units? Ans: The Importance of Units Units give numbers a particular meaning. Example: I am 5 feet 10 inches tall. Feet and inches are units. I co
qualitative analysis of cation
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